[digitalradio] Re: Multiple Digital Modes: Time to get rid of most ?
Hi Rud. The decoding delay is minimal and probably not even noticeable, even in chat mode. The decoding delay will not be an issue in chat mode. But it is annoying for someone interesting in DXes or just high rate of QSOs. It will take too long to just decode call sign during CQ to find out whether one is interested to make QSO. This is one of the reasons CW is so popular. Trained operator is able to decode call sign darn fast. I have to improve myself in CW reception. I was never able to cross the boundary of counting dots and dashes. The delay in a chat is waiting for a buffer to fill so the FEC packet can be constructed. In non-FEC mode characters are sent as typed. So for a 20 character message it requires the time for 20 keystrokes, calculation of the FEC and then the transmission of the 20 characters plus FEC characters. The delay depends on FEC and interleaving. It might be interesting to try the following: 6. After the FEC is received and decoded the receiver displays any corrected characters in the appropriate place on the display. This was proposed by Phill Karn in MFSK16 list some months ago. You could do it if you do do not have interleaving and use systematic code. With modes like MFSK16 you may only slightly improve decoding delay by using shorter Viterbi decoder. But the delay caused by interleaving and convolutional code is not avoidable. 73, Vojtech OK1IAK
Re: [digitalradio] Re: Multiple Digital Modes: Time to get rid of most ?
FWIW http://psk.gladstonefamily.net/cgi-bin/pskstats.pl (see also http://psk.gladstonefamily.net/pskmap.html ) Well over 25,000 distinct callsigns seen on PSK over the last three months. I doubt anything will overtake PSK in popularity in this decade. Simon HB9DRV -- From: Dave Bernstein [EMAIL PROTECTED] Metcalfe's Law states that the value of a telecommunications network is proportional to the square of the number of users of the system. I suspect that it also applies to digital modes.
[digitalradio] PSK reporter
Simon must have been reading my mind. As I was sitting in the shack this morning with the PSK Reporter web page plotting my heard stations on the map, I was thinking... with the popularity of PSK31 the PSK Reporter pages have to be the best propagation tools there are. It is not live, updates every 5 minutes, but it really tells me a lot about the band I am monitoring. Too bad we cannot marry it to Joe DX of Spotcollector fame and have a verbal announcement when a new country (for the day) is plotted on the map. The WSPR mode and the N8FQ designed database are perhaps the most useful in terms of propgation but it takes time to study. PSK Reporter is easy, just look at the map of the world and see who you are hearing and who is hearing you. -- In digitalradio@yahoogroups.com, Simon Brown \(Laptop\) [EMAIL PROTECTED] wrote: FWIW http://psk.gladstonefamily.net/cgi-bin/pskstats.pl (see also http://psk.gladstonefamily.net/pskmap.html ) Well over 25,000 distinct callsigns seen on PSK over the last three months. I doubt anything will overtake PSK in popularity in this decade. Simon HB9DRV -- From: Dave Bernstein [EMAIL PROTECTED] Metcalfe's Law states that the value of a telecommunications network is proportional to the square of the number of users of the system. I suspect that it also applies to digital modes.
[digitalradio] Re: PSK reporter
Andrew, I've got to agree that Simon and Philip Gladstone have done a wonderful job in introducing this feature. Propagation studies are a great way for Hams to use their stations even when they cannot transmit. Jon W1MNK Brandon FL USA ***Celebrating 30 years in IT with IBM 4/24/08!!*** Simon must have been reading my mind. As I was sitting in the shack this morning with the PSK Reporter web page plotting my heard stations on the map, I was thinking... with the popularity of PSK31 the PSK Reporter pages have to be the best propagation tools there are. It is not live, updates every 5 minutes, but it really tells me a lot about the band I am monitoring. Too bad we cannot marry it to Joe DX of Spotcollector fame and have a verbal announcement when a new country (for the day) is plotted on the map. The WSPR mode and the N8FQ designed database are perhaps the most useful in terms of propgation but it takes time to study. PSK Reporter is easy, just look at the map of the world and see who you are hearing and who is hearing you.
RE: [digitalradio] PSK reporter
WinWarbler does extract callsigns from all PSK QSOs on the band you are monitoring, and you can configure WinWarbler do insert these into your SpotCollector database where Joe DX will announce the ones you need -- along with anything you need in PSK or any other mode that is spotted by the rest of the world-wide community of cluster users. 73, Dave, AA6YQ -Original Message- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Andrew O'Brien Sent: Thursday, April 24, 2008 8:06 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] PSK reporter Simon must have been reading my mind. As I was sitting in the shack this morning with the PSK Reporter web page plotting my heard stations on the map, I was thinking... with the popularity of PSK31 the PSK Reporter pages have to be the best propagation tools there are. It is not live, updates every 5 minutes, but it really tells me a lot about the band I am monitoring. Too bad we cannot marry it to Joe DX of Spotcollector fame and have a verbal announcement when a new country (for the day) is plotted on the map. The WSPR mode and the N8FQ designed database are perhaps the most useful in terms of propgation but it takes time to study. PSK Reporter is easy, just look at the map of the world and see who you are hearing and who is hearing you. -- In digitalradio@yahoogroups.com, Simon Brown \(Laptop\) [EMAIL PROTECTED] wrote: FWIW http://psk.gladstonefamily.net/cgi-bin/pskstats.pl (see also http://psk.gladstonefamily.net/pskmap.html ) Well over 25,000 distinct callsigns seen on PSK over the last three months. I doubt anything will overtake PSK in popularity in this decade. Simon HB9DRV -- From: Dave Bernstein [EMAIL PROTECTED] Metcalfe's Law states that the value of a telecommunications network is proportional to the square of the number of users of the system. I suspect that it also applies to digital modes.
[digitalradio] Some thoughts about PSK reporter and Winwarbler
Winwarbler's Stations Heard list is more live than PSK Reporter , it displays the callsign heard almost instantly whereas PSK Reporter takes 5 minutes. Winwarbler's DX View can plot the Stations Heard in PSK on to default world map within DX View, in some ways this is easier and less RAM/CPU intensive that PSK Repoter. The Winwarbler/DXView/Spot Collector combination does not plot stations OTHER people heard unless they posted the information to a DX Cluster. PSK Reporter in combination with Ham Radio Deluxe and DM780 will post information that other PSK stations are hearing, if they too are using PSK Reporter in combination with Ham Radio Deluxe and DM780. DXView uses it's default map but also gives an option of using Google maps. Winwarbler has many useful configuration possibilities for Google Maps whereas PSK Reporter does not appear to have the same options. I'm not sure why the DX View default map plots the call signs of received PSK31 signals but in Googlemaps it appears to plot only one callsign at a time. Maybe I have this wrong. Winwarbler's Stations Heard feature lists signal quality and signal strength. DM780 gives you some of this information but it does not get displayed on PSK Reporter's Google maps I think PSK Reporter plots the location based on grid square extracted from an ongoing QSO, I think. DXView appears to plot it's map based on the administrative capital of the call area. Winwarbler displays the spot of a PSK station on the map along with the VFO frequency PLUS the AF frequency, PSK Reporter appears to use VFO frequency only. DXview is capable of dispaying path lines between two stations on the default map. PSK Reporter does not do this yet although I suspect that it is possible. DX View's default map can be filtered to show stations heard from specific continents whereas PSK Reporter cannot. --- In digitalradio@yahoogroups.com, Dave AA6YQ [EMAIL PROTECTED] wrote: WinWarbler does extract callsigns from all PSK QSOs on the band you are monitoring, and you can configure WinWarbler do insert these into your SpotCollector database where Joe DX will announce the ones you need -- along with anything you need in PSK or any other mode that is spotted by the rest of the world-wide community of cluster users. 73,
